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/* |
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* main.c -- entry point and argument parsing for the UAR program |
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* |
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* This program is part of the UAR (Universal Archive) utility suite. |
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* Copyright (C) 2024 OSN, Inc. |
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* Author: Ar Rakin <[email protected]> |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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|
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#define _XOPEN_SOURCE 500 |
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|
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#include <assert.h> |
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#include <errno.h> |
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#include <getopt.h> |
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#include <libgen.h> |
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#include <stdarg.h> |
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#include <stdbool.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <sys/stat.h> |
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|
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#include "uar.h" |
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#include "xmalloc.h" |
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|
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#ifdef HAVE_CONFIG_H |
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# include "config.h" |
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#else |
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# define PACKAGE_NAME "uar" |
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# define PACKAGE_VERSION "1.0" |
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# define PACKAGE_BUGREPORT "[email protected]" |
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#endif |
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|
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#ifndef NDEBUG |
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# define debug(...) pdebug (__FILE__, __LINE__, __VA_ARGS__) |
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#else |
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# define debug(...) |
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#endif |
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|
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/* Command line options. */ |
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static struct option const long_options[] = { |
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{ "create", no_argument, NULL, 'c' }, |
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{ "extract", no_argument, NULL, 'x' }, |
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{ "list", no_argument, NULL, 't' }, |
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{ "verbose", no_argument, NULL, 'v' }, |
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{ "file", required_argument, NULL, 'f' }, |
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{ "directory", required_argument, NULL, 'C' }, |
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{ "help", no_argument, NULL, 'h' }, |
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{ "version", no_argument, NULL, 'V' }, |
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{ NULL, 0, NULL, 0 }, |
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}; |
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|
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static char const short_options[] = "cxtvf:C:hV"; |
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|
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/* Program name. */ |
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static char *progname = NULL; |
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|
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/* Flags for the command line options. */ |
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enum uar_mode |
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{ |
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MODE_NONE, |
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MODE_CREATE, |
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MODE_EXTRACT, |
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MODE_LIST |
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}; |
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|
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struct uar_params |
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{ |
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enum uar_mode mode; |
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bool verbose; |
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char *file; |
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char *cwd; |
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union |
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{ |
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struct |
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{ |
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char **targets; |
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size_t ntargets; |
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} create; |
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} params; |
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}; |
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|
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static struct uar_params params = { 0 }; |
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|
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/* Print usage information. */ |
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static void |
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usage (void) |
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{ |
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printf ("Usage:\n"); |
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printf (" uar [OPTION]... [FILE]...\n"); |
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printf ("\n"); |
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printf ("Universal Archive utility.\n"); |
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printf ("\n"); |
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printf ("Options:\n"); |
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printf (" -c, --create Create a new archive\n"); |
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printf (" -x, --extract Extract files from an archive\n"); |
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printf (" -t, --list List the contents of an archive\n"); |
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printf (" -v, --verbose Verbose mode\n"); |
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printf ( |
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" -f, --file=ARCHIVE Use archive file or directory ARCHIVE\n"); |
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printf (" -C, --directory=DIR Change to directory DIR\n"); |
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printf (" -h, --help Display this help and exit\n"); |
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printf (" -V, --version Output version information and exit\n"); |
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printf ("\n"); |
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printf ("Report bugs to: <" PACKAGE_BUGREPORT ">\n"); |
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} |
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|
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/* Print version information. */ |
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static void |
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show_version (void) |
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{ |
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printf ("OSN %s %s\n", PACKAGE_NAME, PACKAGE_VERSION); |
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printf ("\n"); |
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printf ("Copyright (C) 2024 OSN, Inc.\n"); |
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printf ("License GPLv3+: GNU GPL version 3 or later " |
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"<http://gnu.org/licenses/gpl.html>\n"); |
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printf ( |
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"This is free software: you are free to change and redistribute it.\n"); |
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printf ("There is NO WARRANTY, to the extent permitted by law.\n"); |
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printf ("\n"); |
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printf ("Written by Ar Rakin <[email protected]>\n"); |
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} |
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|
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/* Print a debug message. */ |
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static void |
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pdebug (char const *file, int line, char const *format, ...) |
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{ |
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if (!params.verbose) |
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return; |
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|
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va_list args; |
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va_start (args, format); |
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fprintf (stderr, "%s(verbose): %s:%i: ", progname, file, line); |
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vfprintf (stderr, format, args); |
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va_end (args); |
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} |
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|
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/* Print a message. */ |
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static void |
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pinfo (char const *format, ...) |
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{ |
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va_list args; |
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va_start (args, format); |
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fprintf (stdout, "%s: ", progname); |
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vfprintf (stdout, format, args); |
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va_end (args); |
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} |
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|
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/* Print an error message. */ |
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static void |
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perr (char const *format, ...) |
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{ |
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va_list args; |
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va_start (args, format); |
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fprintf (stderr, "%s: ", progname); |
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vfprintf (stderr, format, args); |
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va_end (args); |
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} |
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|
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/* Cleanup memory. */ |
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static void |
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cleanup () |
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{ |
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if (params.params.create.targets != NULL) |
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free (params.params.create.targets); |
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|
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if (params.cwd != NULL) |
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free (params.cwd); |
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|
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if (params.file != NULL) |
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free (params.file); |
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} |
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|
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/* Initialize the program. */ |
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static void |
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initialize (char *argv0) |
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{ |
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atexit (&cleanup); |
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|
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progname = strrchr (argv0, '/'); |
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|
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if (progname != NULL) |
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progname++; |
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else |
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progname = argv0; |
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} |
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|
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/* Create an archive. */ |
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static void |
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create_archive (void) |
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{ |
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assert (params.mode == MODE_CREATE); |
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assert (params.params.create.ntargets > 0); |
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assert (params.params.create.targets != NULL); |
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|
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pinfo ("creating archive: %s\n", params.file); |
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|
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struct uar_archive *uar = uar_create (); |
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|
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if (uar == NULL || uar_has_error (uar)) |
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{ |
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pinfo ("failed to create archive: %s\n", strerror (errno)); |
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return; |
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} |
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|
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for (size_t i = 0; i < params.params.create.ntargets; i++) |
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{ |
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struct stat stinfo = { 0 }; |
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|
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if (stat (params.params.create.targets[i], &stinfo) != 0) |
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{ |
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perr ("cannot stat '%s': %s\n", |
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params.params.create.targets[i], strerror (errno)); |
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uar_close (uar); |
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return; |
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} |
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|
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struct uar_file *file = NULL; |
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|
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if (S_ISREG (stinfo.st_mode)) |
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{ |
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pinfo ("adding file: %s\n", |
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params.params.create.targets[i]); |
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file = uar_add_file ( |
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uar, basename (params.params.create.targets[i]), |
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params.params.create.targets[i]); |
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|
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if (file == NULL) |
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{ |
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perr ("failed to add file: %s\n", strerror (errno)); |
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uar_close (uar); |
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return; |
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} |
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} |
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else if (S_ISDIR (stinfo.st_mode)) |
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{ |
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pinfo ("adding directory: %s\n", |
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params.params.create.targets[i]); |
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file = uar_add_dir ( |
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uar, basename (params.params.create.targets[i]), |
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params.params.create.targets[i]); |
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|
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if (file == NULL) |
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{ |
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perr ("failed to add directory: %s (%s)\n", |
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strerror (errno), uar_strerror (uar)); |
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uar_close (uar); |
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return; |
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} |
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} |
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else if (S_ISLNK (stinfo.st_mode)) |
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{ |
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assert (false && "Not implemented"); |
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} |
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else |
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{ |
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perr ("failed to add file: %s: file type not supported\n", |
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params.params.create.targets[i]); |
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uar_close (uar); |
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return; |
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} |
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|
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assert (file != NULL); |
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uar_file_set_mode (file, stinfo.st_mode & 07777); |
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} |
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|
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pinfo ("writing archive: %s\n", params.file); |
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|
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if (!uar_write (uar, params.file)) |
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{ |
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perr ("failed to write archive: %s\n", strerror (errno)); |
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uar_close (uar); |
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return; |
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} |
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|
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#ifdef UAR_PRINT_VERBOSE_IMPL_INFO |
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uar_debug_print (uar, false); |
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#endif |
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uar_close (uar); |
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} |
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|
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/* Archive extraction callback. */ |
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static bool |
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extract_archive_callback (struct uar_file *file) |
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{ |
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pinfo ("extracting: %s\n", uar_get_file_name (file)); |
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return true; |
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} |
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|
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/* Extract an archive. */ |
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static void |
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extract_archive () |
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{ |
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assert (params.mode == MODE_EXTRACT); |
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|
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pinfo ("extracting archive: %s\n", params.file); |
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|
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struct uar_archive *uar = uar_open (params.file); |
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|
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if (uar == NULL || uar_has_error (uar)) |
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{ |
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pinfo ("failed to open archive: %s\n", strerror (errno)); |
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return; |
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} |
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|
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#ifdef UAR_PRINT_VERBOSE_IMPL_INFO |
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uar_debug_print (uar, false); |
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#endif |
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|
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if (!uar_extract (uar, params.cwd, &extract_archive_callback)) |
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{ |
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pinfo ("failed to extract archive: %s\n", strerror (errno)); |
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return; |
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} |
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|
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uar_close (uar); |
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} |
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|
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int |
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main (int argc, char **argv) |
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{ |
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initialize (argv[0]); |
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assert (progname != NULL && "progname is NULL"); |
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|
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while (true) |
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{ |
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int opt |
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= getopt_long (argc, argv, short_options, long_options, NULL); |
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|
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if (opt == -1) |
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break; |
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|
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switch (opt) |
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{ |
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case 'c': |
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params.mode = MODE_CREATE; |
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break; |
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|
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case 'x': |
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params.mode = MODE_EXTRACT; |
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break; |
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|
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case 't': |
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params.mode = MODE_LIST; |
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break; |
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|
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case 'v': |
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params.verbose = true; |
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debug ("Verbose mode enabled\n", progname); |
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break; |
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|
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case 'f': |
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params.file = optarg; |
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break; |
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|
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case 'C': |
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params.cwd = optarg; |
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break; |
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|
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case 'h': |
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usage (); |
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exit (0); |
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|
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case 'V': |
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show_version (); |
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exit (0); |
| 379 |
|
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case '?': |
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usage (); |
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exit (1); |
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|
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default: |
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exit (1); |
| 386 |
} |
| 387 |
} |
| 388 |
|
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if (params.file != NULL) |
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{ |
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char *file = params.file; |
| 392 |
|
| 393 |
if ((params.mode == MODE_EXTRACT || params.mode == MODE_LIST)) |
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{ |
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params.file = realpath (file, NULL); |
| 396 |
|
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if (params.file == NULL) |
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{ |
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perr ("failed to read '%s': %s\n", file, |
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strerror (errno)); |
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exit (1); |
| 402 |
} |
| 403 |
} |
| 404 |
else |
| 405 |
{ |
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params.file = strdup (file); |
| 407 |
} |
| 408 |
} |
| 409 |
|
| 410 |
if (params.cwd != NULL) |
| 411 |
{ |
| 412 |
char *dir = params.cwd; |
| 413 |
params.cwd = realpath (dir, NULL); |
| 414 |
|
| 415 |
if (params.cwd == NULL) |
| 416 |
{ |
| 417 |
perr ("failed to change working directory to '%s': %s\n", |
| 418 |
dir, strerror (errno)); |
| 419 |
exit (1); |
| 420 |
} |
| 421 |
} |
| 422 |
|
| 423 |
if (params.verbose) |
| 424 |
{ |
| 425 |
debug ("Summary of options:\n"); |
| 426 |
debug (" mode: %s\n", params.mode == MODE_CREATE ? "create" |
| 427 |
: params.mode == MODE_EXTRACT ? "extract" |
| 428 |
: "list"); |
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debug (" verbose: %s\n", params.verbose ? "yes" : "no"); |
| 430 |
debug (" file: %s\n", params.file); |
| 431 |
debug (" working directory: %s\n", params.cwd); |
| 432 |
} |
| 433 |
|
| 434 |
switch (params.mode) |
| 435 |
{ |
| 436 |
case MODE_CREATE: |
| 437 |
for (int i = optind; i < argc; i++) |
| 438 |
{ |
| 439 |
params.params.create.targets = xrealloc ( |
| 440 |
params.params.create.targets, |
| 441 |
(params.params.create.ntargets + 1) * sizeof (char *)); |
| 442 |
params.params.create.targets[params.params.create.ntargets] |
| 443 |
= argv[i]; |
| 444 |
params.params.create.ntargets++; |
| 445 |
} |
| 446 |
|
| 447 |
create_archive (); |
| 448 |
break; |
| 449 |
|
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case MODE_EXTRACT: |
| 451 |
extract_archive (); |
| 452 |
break; |
| 453 |
|
| 454 |
case MODE_LIST: |
| 455 |
assert (false && "Not implemented yet"); |
| 456 |
break; |
| 457 |
|
| 458 |
default: |
| 459 |
usage (); |
| 460 |
exit (1); |
| 461 |
} |
| 462 |
|
| 463 |
return 0; |
| 464 |
} |
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